<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            overflow: hidden;
            background: black;
        }
    </style>
</head>

<body>
    <canvas id="canvas-club"></canvas>
    <script>
        var c = document.getElementById("canvas-club");
        var ctx = c.getContext("2d");
        var w = c.width = window.innerWidth;
        var h = c.height = window.innerHeight;
        var clearColor = 'rgba(0, 0, 0, .1)';
        var max = 30;
        var drops = [];

        function random(min, max) {
            return Math.random() * (max - min) + min;
        }

        function O() {}

        O.prototype = {
            init: function() {
                this.x = random(0, w);
                this.y = 0;
                this.color = 'red';
                this.w = 2;
                this.h = 1;
                this.vy = random(4, 5);
                this.vw = 3;
                this.vh = 1;
                this.size = 2;
                this.hit = random(h * .8, h * .9);
                this.a = 1;
                this.va = .96;
            },
            draw: function() {
                if (this.y > this.hit) {
                    ctx.beginPath();
                    ctx.moveTo(this.x, this.y - this.h / 2);

                    ctx.bezierCurveTo(
                        this.x + this.w / 2, this.y - this.h / 2,
                        this.x + this.w / 2, this.y + this.h / 2,
                        this.x, this.y + this.h / 2);

                    ctx.bezierCurveTo(
                        this.x - this.w / 2, this.y + this.h / 2,
                        this.x - this.w / 2, this.y - this.h / 2,
                        this.x, this.y - this.h / 2);

                    ctx.strokeStyle = 'hsla(180, 100%, 50%, ' + this.a + ')';
                    ctx.stroke();
                    ctx.closePath();

                } else {
                    ctx.fillStyle = this.color;
                    ctx.fillRect(this.x, this.y, this.size, this.size * 5);
                }
                this.update();
            },
            update: function() {
                if (this.y < this.hit) {
                    this.y += this.vy;
                } else {
                    if (this.a > .03) {
                        this.w += this.vw;
                        this.h += this.vh;
                        if (this.w > 100) {
                            this.a *= this.va;
                            this.vw *= .98;
                            this.vh *= .98;
                        }
                    } else {
                        this.init();
                    }
                }

            }
        }

        function resize() {
            w = c.width = window.innerWidth;
            h = c.height = window.innerHeight;
        }

        function setup() {
            for (var i = 0; i < max; i++) {
                (function(j) {
                    setTimeout(function() {
                        var o = new O();
                        o.init();
                        drops.push(o);
                    }, j * 200)
                }(i));
            }
        }


        function anim() {
            ctx.fillStyle = clearColor;
            ctx.fillRect(0, 0, w, h);
            for (var i in drops) {
                drops[i].draw();
            }
            requestAnimationFrame(anim);
        }


        window.addEventListener("resize", resize);

        setup();
        anim();
    </script>
</body>

</html>